Abstract: The invention provides reactive power control equipment that controls the reactive power adjusted by a synchronous condenser coupled to an electric power grid and the reactive power of the electric power supplied to the electric power grid, to optimally control the reactive power in each load terminal point (power consumption area), considering instability of the electric power supplied from renewable energy power generation equipment.

Abstract: The invention provides reactive power control equipment that controls the reactive power adjusted by a synchronous condenser coupled to an electric power grid and the reactive power of the electric power supplied to the electric power grid, to optimally control the reactive power in each load terminal point (power consumption area), considering instability of the electric power supplied from renewable energy power generation equipment.

Abstract: A method for manufacturing lignin for carbon fiber spinning, comprising subjecting to heat treatment in a non-oxidizing atmosphere a phenolated lignin obtained by phenolation of lignin dissolved out in delignification of a woody material, or a phenolated lignin derived from digestion of a woody material with a phenol.

Abstract: A polyvinyl chloride resin composition for powder molding, containing a dry blend of a polyvinyl chloride resin and a plasticizer, wherein the plasticizer is a mixed trimellitate of a mixture of compounds of the formula ##STR1## where R is an alkyl group, each of the compounds contains the same or different alkyl group in the same or different molecules, and the alkyl groups in the mixture have a straight chain ratio of at least 85 mol % and consist of 5 to 55 mol % of alkyl groups having at most seven carbon atoms, 45 to 95 mol % of alkyl groups having eight carbon atoms, and at most 10 mol % of alkyl groups having at least nine carbon atoms.